DAHUA®|HY-SA21A-W2(868)|3 YR WTY. Airshield Wireless Optical Smoke Detector
SKU: 54523384816

DAHUA®|HY-SA21A-W2(868)|3 YR WTY. Airshield Wireless Optical Smoke Detector

Sale price$76.50 Regular price$85.00
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 7 - Jul 12

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Description

DAHUA®|HY-SA21A-W2(868)|3 YR WTY. Airshield Wireless Optical Smoke DetectorDahua Wireless Smoke Alarm provides battery powered smoke detection and alarm functions within a single unit. Advanced electronics in conjunction with a photoelectric smoke sensing chamber provide early detection of smoke and high immunity against unwanted alarms. This kind of smoke alarm does not require a mains supply and is suitable for general residential applications. Timely notification of the smoke alarm can be displayed on DMSS App in real

Dahua Wireless Smoke Alarm provides battery-powered smoke detection and alarm functions within a single unit. Advanced electronics in conjunction with a photoelectric smoke sensing chamber provide early detection of smoke and high immunity against unwanted alarms. This kind of smoke alarm does not require a mains supply and is suitable for general residential applications. Timely notification of the smoke alarm can be displayed on DMSS App in real time.

Specifications

  • Split-spectrum sensor technology
  • Test and silence features in one single button
  • Loud sound output over 85 dB(A) at 3 meters
  • Low quiescent current consumption
  • Surface-mount device (SMD) circuit board design
  • Low battery warning signal
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 54523384816

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Gayle Green
San Leandro, US
★★★★★ 5
Nice Shirt
Color: Green&white, Size: Medium
Love shirt
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Reviewed in the United States on May 1, 2026
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Beatlebum999
San Leandro, US
★★★★★ 5
Great men's Tshirt
Color: Off White&burgundy, Size: XX-Large
Great men's TShirt looks great comfortable good quality good brand good price nice colors. Fast delivery Thank you Amazon
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Reviewed in the United States on June 6, 2026
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Jeremy
Alexandria, US
★★★★★ 4
As far as punk rock inspired shirts go this one is
Color: Off White&black, Size: XX-Large
The shirt looks nice but the material isn't what it looks like in the picture. It's actually kind of thick, almost like a weaved cotton pattern, if that makes sense. I got it during a heatwave, couldn't wear it. But if you're looking for a decent fall weather t-shirt, well worth the grab.
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Reviewed in the United States on August 28, 2025
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Lori Ann Rojas
Grantham, US
★★★★★ 5
A shirt that makes you feel good...
Color: Off White&black, Size: XX-Large
Im very pickey about fabric and the way it fits my body. This shirt is comfortable. I love the colors. I liked it so much, I bought another one. This shirt makes me feel good when i put it on.
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Reviewed in the United States on September 28, 2025
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Eric Graham
Fort Morgan, US
★★★★★ 3
Go up a size
Color: Off White&burgundy, Size: X-Large
Material feels great but sizes are not accurate. If you’re a XL, go up a size.
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Reviewed in the United States on April 4, 2026

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